I would welcome such pieces of information if you didnt put the "all cops are pigs" on top of it Flockula.
Also the comments on how policemen are hired to murder their own people during uprising/revolts/demonstrations/etc, notwithstanding the term "murderer", the policemen ARE SUPPOSED to intervene inside the country which hires them. Thus their job is actually doing actions "against" their own people. Or do you suggest the policemen should only arrest/detain outsiders?
Police = Ministry of Security (interior)
Military = Ministry of Defense (exterior)
What would be exceptionnal is sending policemen to participate in an invasion, or sending military to do anti-riot stuff. Then we can discuss ad nauseam the legitimacy of using force (either proportionned or disproportionned force, quite subjective matter too), but there is no point discussing why policemen are where they are atm, and doing what they are doing.
I know you're not discovering those facts, just pointing bad arguments.